Original World War 2 refrigeration industry trade magazine vintage ad for YORK ICE MACHINERY CORPORATION of York, PA.  Bringing the Desert to the Jungle.  To protect highly sensitive Signal Crops equipment in the steaming jungle and on dank islands York is providing rooms full of desert air. The nature, purpose and locations of this equipment are military secrets. York Refrigeration and Air Conditioning For War.  Old 1943 WW2 wartime era propaganda magazine advertisement.